background: parasitic intestinal infections are still among socioeconomic prob­lems in the world, especially in developing countries like iran. food-handlers that directly deal with production and distribution of foods between societies are one of the most important sources to transmit parasitic infections to humans. the aim of this study was to determine the prevalence of intestinal parasitic ...

The diseases caused by protozoan parasite are responsible for considerable mortality and morbidity, affecting more than 500 million of people in the world. The epidemiological control of protozoan is unsatisfactory due to difficulties of vector and reservoir control; while the progress in the development of vaccine tends to be slow and arduous. Currently, the chemotherapy remains essential comp...

This text is the composite work of 27 authors, all of whom are active investigators of diseases of viral and rickettsial etiology. Approximately one third of the book is devoted to a detailed discussion of the nature and properties of these infectious agents. Included in this portion are also considerations of egg and tissue culture technics, as well as methods of virus purification and titrati...